Atomic properties of Cd-like and Sn-like ions for the development of frequency standards and search for the variation of the fine-structure constant

Abstract

A high-precision relativistic calculations of Cd-like Nd${}^{12+}$, Sm${}^{14+}$ and Sn-like Pr${}^{9+}$, Nd${}^{10+}$ atomic properties is carried out using an approach that combines configuration interaction and a linearized coupled-cluster method. These ions have long-lived metastable states with transitions accessible by laser excitations, relatively simple electronic structure, high sensitivity to $\alpha$ variation, and stable isotopes. Breit and QED corrections were included into the calculations. Energies, transition wavelengths, electric- and magnetic-multipole reduced matrix elements, lifetimes, and sensitivity coefficients $q$ and $K$ to the variation of the fine-structure constant $\alpha$ were obtained. A detailed study of uncertainties was performed. Energies for similar Cd-like Ba${}^{8+}$, La${}^{9+}$, Ce${}^{10+}$, Pr${}^{11+}$ and Sn-like Ba${}^{6+}$ ions were calculated and compared with experiment for further tests of the accuracy.

13 pages. arXiv admin note: text overlap with arXiv:1407.8272

References in corpus (5)

• Enhanced laboratory sensitivity to variation of the fine-structure constant using highly-charged ions
• Development of a configuration-interaction + all-order method for atomic calculations
• Highly-charged ions for atomic clocks, quantum information, and search for $\alpha$-variation
• Study of highly-charged Ag-like and In-like ions for the development of atomic clocks and search for $\alpha$-variation
• Atomic properties of superheavy elements No, Lr, and Rf

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